134330431421 has 2 divisors, whose sum is σ = 134330431422. Its totient is φ = 134330431420.

The previous prime is 134330431399. The next prime is 134330431429. The reversal of 134330431421 is 124134033431.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107903052196 + 26427379225 = 328486^2 + 162565^2 .

It is an emirp because it is prime and its reverse (124134033431) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-134330431421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134330431429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67165215710 + 67165215711.

It is an arithmetic number, because the mean of its divisors is an integer number (67165215711).

Almost surely, 2^134330431421 is an apocalyptic number.

It is an amenable number.

134330431421 is a deficient number, since it is larger than the sum of its proper divisors (1).

134330431421 is an equidigital number, since it uses as much as digits as its factorization.

134330431421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 134330431421 its reverse (124134033431), we get a palindrome (258464464852).

The spelling of 134330431421 in words is "one hundred thirty-four billion, three hundred thirty million, four hundred thirty-one thousand, four hundred twenty-one".